| Items | Unit | Plant 1 | Plant 2 | Plant 3* | Plant 4* | Plant 5 | Plant 6* | Plant 7 | Plant 8 |
| The RO system cost | $ | 35,000 | 27,000 | 35,000 | 32,000 | 40,000 | 28,600 | 25,400 | 45,000 |
| RO system installation cost | $ | 7,000 | 5,000 | 7,000 | 6,500 | 0 | 5,000 | 4,500 | 0 |
| Generator power | kVA | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 |
| Well drill cost with motor cost | $ | 1300 | 1300 | 1300 | 1300 | 1300 | 1300 | 1300 | 1300 |
| Building cost (15 × 7) m | $ | 22,245.8 | 22,245.8 | 22,245.8 | 22,245.8 | 22,245.8 | 22,245.8 | 22,245.8 | 22,245.8 |
| Fuel consuming by generator | litre/hr | 9 | 7 | 9 | 9 | 9 | 7 | 7 | 9 |
| Daily working hour of plant | hr | 10 | 10 | 10 | 22 | 8 | 20 | 22 | 22 |
| Membrane element cost | $ | 850 | 850 | 850 | 850 | 850 | 850 | 850 | 850 |
| Number of elements | No. | 16 | 16 | 12 | 12 | 9 | 6 | 6 | 12 |
| Replacement period in months | Month | 12 | 12 | 12 | 5 | 12 | 9 | 6 | 5 |
| The selling price of water | $/m3 | 1.69 | 1.69 | 0.64 | 0.85 | 1.69 | 0.85 | 1.69 | 1.69 |